x/3+21=30 - solution

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Solution for x/3+21=30 equation:

x in (-oo:+oo)

x/3+21 = 30 // - 30

x/3-30+21 = 0

1/3*x-9 = 0 // + 9

1/3*x = 9 // : 1/3

x = 9/1/3

x = 27

x = 27

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